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🛑 Brake Cutoff (E-Brake) Sensor Install

Brake cutoff sensors kill motor power the instant you squeeze a lever, the safety net that makes Bafang's cadence PAS feel predictable. Here is how to fit and test them on every build.

July 12, 20261 min read

🛑 Brake Cutoff (E-Brake) Sensor Install

Bafang brake levers with built-in e-brake cutoff sensors

Bafang PAS is cadence-based, meaning the motor keeps pushing for a moment after you stop pedaling. Brake cutoff sensors are the safety net that kills motor power the instant you brake. Recommended for every build.

  • Mechanical/cable brake users typically use the included brake levers with built-in cutoff switches — swap them in for your existing levers.
  • Hydraulic brake users can't swap levers, so use the magnetic e-brake sensor type: mount a small sensor on the lever body and a magnet on the moving lever so the magnet passes the sensor when you pull the brake.
  • Route each sensor's Higo plug to the left/right brake leads on the harness, aligning the arrows.
  • Test both brakes with the wheel off the ground: pulling either lever must cut the motor. If a brake stays engaged (Error 25 / motor won't run), unplug the brake sensors one at a time to isolate a stuck switch.
Supplement: Bafang e-brake sensor installation guide
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